10000 proc.c: Binding#local_variables · eagletmt/ruby@a11831a · GitHub
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proc.c: Binding#local_variables
* proc.c (bind_local_variables): allowing binding to list its local variables. patch by Jack Danger Canty <jackdanger AT squareup.com> at [ruby-core:56543]. [Feature ruby#8773] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44392 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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‎ChangeLog

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@@ -1,3 +1,9 @@
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Wed Dec 25 01:03:00 2013 Nobuyoshi Nakada <nobu@ruby-lang.org>
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* proc.c (bind_local_variables): allowing binding to list its
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local variables. patch by Jack Danger Canty <jackdanger AT
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squareup.com> at [ruby-core:56543]. [Feature #8773]
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Tue Dec 24 23:20:38 2013 Nobuyoshi Nakada <nobu@ruby-lang.org>
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* test/fileutils/fileasserts.rb (assert_ownership_user): new

‎proc.c

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@@ -446,6 +446,58 @@ check_local_id(VALUE bindval, volatile VALUE *pname)
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return lid;
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}
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/*
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* call-seq:
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* binding.local_variables -> Array
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*
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* Returns the +symbol+ names of the binding's local variables
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*
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* def foo
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* a = 1
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* 2.times do |n|
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* binding.local_variables #=> [:a, :n]
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* end
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* end
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*
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* This method is short version of the following code.
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*
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* binding.eval("local_variables")
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*
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*/
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static VALUE
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bind_local_variables(VALUE bindval)
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{
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VALUE ary = rb_ary_new();
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const rb_binding_t *bind;
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const rb_env_t *env;
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VALUE envval;
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GetBindingPtr(bindval, bind);
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envval = bind->env;
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GetEnvPtr(envval, env);
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do {
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const rb_iseq_t *iseq;
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int i;
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ID id;
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iseq = env->block.iseq;
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for (i = 0; i < iseq->local_table_size; i++) {
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id = iseq->local_table[i];
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if (id) {
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const char *vname = rb_id2name(id);
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if (vname) {
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rb_ary_push(ary, ID2SYM(id));
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}
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}
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}
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} while ((envval = env->prev_envval) != 0);
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return ary;
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}
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/*
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* call-seq:
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* binding.local_variable_get(symbol) -> obj
@@ -2718,6 +2770,7 @@ Init_Binding(void)
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rb_define_method(rb_cBinding, "clone", binding_clone, 0);
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rb_define_method(rb_cBinding, "dup", binding_dup, 0);
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rb_define_method(rb_cBinding, "eval", bind_eval, -1);
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rb_define_method(rb_cBinding, "local_variables", bind_local_variables, 0);
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rb_define_method(rb_cBinding, "local_variable_get", bind_local_variable_get, 1);
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rb_define_method(rb_cBinding, "local_variable_set", bind_local_variable_set, 2);
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rb_define_method(rb_cBinding, "local_variable_defined?", bind_local_variable_defined_p, 1);

‎test/ruby/test_variable.rb

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@@ -83,6 +83,17 @@ def test_local_variables3
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end.call
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end
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def local_variables_of(bind)
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this_should_not_be_in_bind = 2
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bind.local_variables
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end
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def test_local_variables_from_other_method_binding
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feature8773 = '[Feature #8773]'
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x = 1
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assert_equal([:x], local_variables_of(binding), feature8773)
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end
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def test_global_variable_0
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assert_in_out_err(["-e", "$0='t'*1000;print $0"], "", /\At+\z/, [])
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end

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